Microbiome composition of Pacific oysters (Magallana gigas) under control conditions (23C, fed ad libitum), 16S rRNA metabarcoding control samples, DECICOMP project

The microbiome plays a crucial role in the health and disease resistance of Pacific oysters (Magallana gigas). This study investigates the microbial composition of two families (F11N and F14R) of 3-month-old disease-susceptible from biparental oysters, maintained under permissive conditions (23C, fed ad libitum). Acclimatation lasted 16 days before infection via cohabitation for 72 hours, with sampling at 0h, 3h, 6h, 12h, 24h, 48h, and 72h. Each sample is a pool of 10 oysters, with three replicates. DNA was extracted, and 16S rRNA metabarcoding sequencing (V3-V4 regions) was performed using an Illumina MiSeq platform (2x250 bp). The dataset provides insights into baseline microbial communities and serves as a reference for comparative analyses with stress-exposed oysters.